Fluid-pump.



o. H. & ALF. PIEPER.

FLUID PUMP.

APPLICATION FILED FEB. 1. 1914.

1,263,651. Patented Nov. 7,1916.

2 SHEETS-SHEET 2.

I gia/wanton scarl Pefel meoow PL'Uel UNITED sTAtrns PATENT orrrcn.

OSCAR AH.' PIEPER AND ALPHONSE F. PIEPEB, OF ROCHESTER, NEW YORK.

FLUID-PUMP.

A To aZZvwLo/mit may concern -v Be it known that we, OSCAR H. Pmrn and'ALPnoNsE F. Pinnen,- both of Rochester, in the county of Monroe and State of New 5 York', have invented certain new and useful Improvements in Fluid-Pumps; and we do hereby declare the following tobe a full, clear, ,and exact description of the same, reference being -had to the accompanying drawings, forming a part of this speciication, and to the reference-numerals marked thereon.

Our invention relates to fluid pumps,l with reference particularly to that classI of devices designed for compressing` air or other luid, and it has for its object to improve the construction of such compressors, so as to aord an apparatus thatv can be economically manufactured, and will at the same-time render the working parts readily accessible for adjustment and repairs.

A further purpose of the invention .consists in providing a structure that is simple in its arrangement, and extremely eiicient in operation, while reducing to a minimum the tendency of the parts to get out of order or operate in an imperfect manner.

To these and other ends the invention con- .sists of certain improvements and combinations ofparts all as will be hereinafter more fully described, the novel features being pointed out inthe claim at the end of the specification. l v

` In the drawings: Figure 1 is aside elevation of a pump, showing the application of the present improvements; Fig..2 is a plan view of the same; Fig. 3 is a plan view, with the upper portions ofthe pumpremoved,

and partly in section; Fig. 4 is a side view t of the apparatus, showing the crank case and the valve chambers in section, and Fig. 5 is a transverse sectional view.

Similar yreference .characters throughout the several views indicate vthe same parts.

46 The invention is susceptibleof various applications, and in thepresent embodiment,

we have shownits use, for the purpose of illustration, in connectionl withv a two cylin'f A, A? designating .the cylinder` air numb.,

50 ders -in which travel pistons .such as indicated atB, while C are, connecting rods pivoted to said pistons, and connecting them with. `the crankshaft .02..

,. Attached t9 one .51de of thebyliders is a '55 casing embodying alowervsectionl) and ,an

upper section D2, the lower section' being Specification of Letters Patent.

held im placeby means of the bon De The .lower section D-of the'casing embodies a Patented Nov. 7, 1916. Application inea February 7, 1914. seria; no. 817,192.

sages D, v. and adapted to receive collars D7 formed on--the casing around the ports D5, while D8 designate gaskets. of rubber or other suitable material. The upper section D2 of 'the'. casing' rests directly upon the.

lower section D, aninterlocking joint being aiorded between them by means of the annular flanges such as D9 formed on the lower sectlon of the casingand'coperating with corresponding grooves D1 on the upper section, sultable packing material being employed -therein, andthe sections are held together 1n a manner which will presentlybe 'more fully described. The lower valve vthe upper valve chambers are Adesignated at E5,being separablerfrom the -upper section and connected thereto by a joint similar to that between theupper and lower sections of the casingand they carry centrally depending portions E.6 constituting stops to limit the upward movement` of the valves E4. .'1 hel1valves.E are held against their seatshyI means of springs E7 surrounding the's'tpportionsE and abuttingagainst lugs ,E5 formed upon the valves. The seatl portions Ela-carry depending stop portions E9 whichextend downwardly into the lower valve chambers to limit the upward movementof the valves Ef, the latter 'being held in proper relation to their s eats by means of springs E10 surrounding the. stop portions E? and engagingflangesE11 upon the valves.

The seat,portion need notvnecessarily bel f f formed, Separately .fromth ,upper Section of thecasinshd. a cnnstruction in which the upper valve seats are. formed integral with the upper section of the casing is within the purpose of the present invention.

The upper valve chambers are connected with an air outlet F which may lead to a' suitable air supply tank, while F2 designates an air inlet supported'atl the bottom of' a holder F3, which is attached to the lower section D of the casing and connects the air inlet thereto. The holder F5 is provided with suitableY filtering means, consist-ing in the present instance of a mass of cotton F4 filling the interior thereof and surmounted by a cover l?l5 of wire gauze, or other suitable screening material. 'lhe air entering through the inlet all"2 passes upwardly through the filtering material, above the valves AE and thence into the cylinders A2 from which it is forced above the valves E8 and out through the passage F. 'llhe tops of the upper section are held in engagement with such section by suitable means which may operate at the same timel to hold the upper section in 'engagement with the lower section of the casing, and

this is preferably accomplished'by a yoke member Gr arranged to engage the tops E5 of the upper section in the manner shown in Fig. 4f, said yoke member being held in position by a bolt G2. which engages the threaded opening in the lower section.

'lhe crank case, designated at H, adords an oil reservoir at its base, which may be filled by removing the plug H2, and H9 are dished portions or recesses in the base of the crank case adapted to receive the mobs or projections H4 carried by the crank connections, as the crank shaft is rotated, whereby the lubricating duid is furnished to the upper parts of the case, and is'thence tedto the crank shaft bearings through suitable passages H5, and openings H formed in the bushing H7. '.lhe bearings are provided with passages H8 arranged in spaced relation to the crank case and surrounding the crank shaft, the latter being provided with suitable projections, preferably in the io accenti of disks H9 fixed thereon, which rotate within said passages H3. @penings H1 afford communication between the passages H8 and the interior of the crank case, and by this construction, a continuous circula'- tion of the lubricating Huid is maintained, around the crank shaft Within the bearings until it reaches the projections H, whence it i'sreturned to the crank case through the passage H10. A. removable plate H11 is provided, to aiord access crank case. We claim as our invention `1 lin a pump, the combination with a cylinder and a piston therein, of a casing removably attached to said cylinder and embodying a lower section including a pair of valve chambers communicating with the cylinder, a second valve chamber separated from and mounted directly uponl each of the tir-st named chambers and each provided with an to the interior ot the outlet passage, a seat portion removably carried by the lower portion of each of the upper chambers and having an integral valve seat, a disk valve engaging said seat, v

.a removable top for each of the upper chambers having a downwardly projecting integral portion disposed centrallyA of' the chamber and in the path of said valve to limit its upward movement, a valve seat formed integrally at the bottom of each of the lower chambers, a disk valve engaging each of the last mentioned seats, an integral valve stop portion formed upon the atorei said seat portions and projecting centrally of the chambers into the path ci the valves in the lower chambers, an air inlet connected with said lower section of the casing and an air ltering device' attached directly T 

